/* Design System Variables & Custom Styles */
:root {
    --primary: #3B82F6;
    --secondary: #2563EB;
    --accent: #10B981;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8FAFC;
    --text-primary: #1A1D1F;
    --text-secondary: #64748B;
    --border: #E2E8F0;
    --code-bg: #1E293B;
}

.dark {
    --primary: #3B82F6;
    --secondary: #60A5FA;
    --accent: #34D399;
    --bg-primary: #0F1419;
    --bg-secondary: #1A1F2E;
    --text-primary: #F1F5F9;
    --text-secondary: #94A3B8;
    --border: #2D3748;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
    font-family: 'Inter', sans-serif;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
    background: var(--text-secondary);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* Utilities */
.text-gradient {
    background: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Typing Cursor */
.typing-cursor::after {
    content: '|';
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* Card Hover Effects */
.hover-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.hover-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px -10px rgba(12, 158, 255, 0.2);
}

/* Code Block Styling */
pre {
    background-color: var(--code-bg) !important;
    border-radius: 0.5rem;
    position: relative;
}

/* Progress Bar */
#progress-bar {
    background: linear-gradient(90deg, var(--primary), var(--accent));
    height: 4px;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    transition: width 0.1s;
}

/* Print Optimization */
@media print {
    body { background: white; color: black; }
    .no-print { display: none !important; }
    .page-break { page-break-before: always; }
    pre { border: 1px solid #ccc; color: black; background: white !important; }
    code { color: black; }
}